Unless you were at the very top of the hill the sound was very good. Also... I was never so cold in my days in california then the 2 times I was at the top of the hill for a GD and DMB show. Couldn't feel my feet after a while. Venue itself was great.
I don’t know what it is like today, but back when I saw shows there the sound or the temperature weren’t the only considerations – the occasional wafting of methane from the landfill could be an unpleasant surprise!